GB1002695A - Improvements in folding sheet material - Google Patents

Abstract

1,002,695. Folding paper; feeding sheets. B. G. HEYWOOD. June 25, 1963 [June 26, 1962], No. 24523/62. Headings B6B and B6H. Apparatus comprising a knife folder and a sheet feeder forwarding sheets directly or indirectly to said knife folder, wherein the knife folder and sheet feeder are driven from a common source, is characterized in that the phase relationship of the knife folder and sheet feeder is adjustable by means of a differential. The sheets are separated from the top of a pile 6 by a suction device 7. Movement of the device 7 is controlled by a cam 13 on a shaft 14. Each sheet is fed to a first buckling folder 2, a second buckling folder 2, and finally a knife folder 3. The knife 28 is reciprocated by a lever 29 pivoted at 32. The lever is oscillated by pivoted links 33, 34, and a cam 37 on shaft 38. Driving mechanism.-An electric motor 49 drives variable speed gearing 47 and 44 connected in series. The variable speed gearing 47 drives the endless belt 18 and buckling folders 2, and the variable speed gearing 44 drives shafts 14 and 38. Said gearing 44 is connected to shaft 38 through a differential unit 42. The latter comprises an input chain sprocket 56 and outlet chain sprocket 67 connected through suitable gears, so that on releasing a catch 72 and manually rotating a wheel 68, the output sprocket 67 may be advanced or retarded relative to the input sprocket, whereby the phase relation of the feeder 1 and knife folder 3 is adjusted. This adjustment is made while the apparatus is in operation, the variable speed gearing, or the speed of the motor, being set so that the apparatus is running slowly at the time. Alternatively, the feeder 1 or folder 3 may be driven one from the other through the differential unit 42.